Welcome to the North American Subaru Impreza Owners Club Monday September 22, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Normally Aspirated Powertrain

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 10-25-2004, 09:57 PM   #1
Airboy
Scooby Specialist
 
Member#: 72829
Join Date: Oct 2004
Chapter/Region: W. Canada
Location: Calgary, Canada
Vehicle:
2006 WRX
EFR6758

Default 05 RS wagon idle dipping toward 500RPM

My 1 week old RS stalled on me today while I was slowing down (clutch in) to turn into a parking lot. Prior to this, I have noticed that on occasion, while slowing down at stop lights, the tach would drop below the 500 mark (I am guessing that it is 500, one tick below that and it is "0") before rising back to ~750-800RPM. I can feel the engine shudder when this happens.

If I just let the car idle, the RPM is stable. If I take it up to say, third gear at 2500rpm and then clutch-in, the RPM would fall towards 500RPM before rebounding. This doesn't happen all the time though. When it happened today, the outside temperature is several degrees above freezing and it happened about 5minutes after the car was started.

I am taking it in to the dealership in a few days but wanted to check if anyone has come across this before. If it only happens while the engine is warming up, the dealership won't see it since they are 25min away...

p.s. does this car have electronic throttle?

video clip linked in post below, or here

update Jan 18,2005
After replacing Throttle body (incl IAC), TPS, MAF, and Oxygen Sensor w/o success, Subaru Canada is now arranging for a Technical guy to fly out here to Calgary and do more data logging with a laptop and "specialized software", or something like that.

At the rate things are going, this debugging process will stretch into most of February, or close to Four months
* Registered users of the site do not see these ads.

Last edited by Airboy; 01-19-2005 at 12:38 AM. Reason: link to video clip added
Airboy is offline   Reply With Quote
Old 10-25-2004, 10:04 PM   #2
darioc
Scooby Specialist
 
Member#: 35695
Join Date: Apr 2003
Chapter/Region: NESIC
Location: 06281
Vehicle:
02 RST
98 Outback 92 Wrangler

Default

it has a throttle cable. take it to the dealership so even if nothings wrong, down the road if something comes up youll still be covered by warranty. trust me. its worth your time. something is probably going on though. drop it off at night and let them look at it in the morning.
darioc is offline   Reply With Quote
Old 10-25-2004, 10:17 PM   #3
OneOBS
Scooby Specialist
 
Member#: 63076
Join Date: May 2004
Location: Caulifornia
Vehicle:
2004 Outback Sport
Red!

Default

Take it in. It sounds like the IAC can't catch the RPM drop.
OneOBS is offline   Reply With Quote
Old 10-25-2004, 10:26 PM   #4
west_minist
Scooby Specialist
 
Member#: 53451
Join Date: Jan 2004
Location: Caribbean
Vehicle:
2000 JDM Impreza SRX
w/ AVCS Silver

Default

I have this same behaviour with my EJ204 w/ AVCS and variable Intake.

But my own is an automatic.

Driving and braking hard or sudden stops dues it, or just rev the car and it will happen.
west_minist is offline   Reply With Quote
Old 10-26-2004, 09:17 AM   #5
bmorton
Scooby Newbie
 
Member#: 43528
Join Date: Sep 2003
Location: London, Ontario
Vehicle:
2004 Outback Sport

Default

Throttle control changed to electronic for MY2005. I haven't experienced this on my non-ETC 2004.
bmorton is offline   Reply With Quote
Old 10-26-2004, 09:57 AM   #6
dmatthew
Scooby Newbie
 
Member#: 69247
Join Date: Aug 2004
Chapter/Region: E. Canada
Location: Toronto, Ontario - Canada
Vehicle:
2005 2.5 RS Wagon
Crystal Gray Metallic

Default

I'm going to check later to see if this happens to me
dmatthew is offline   Reply With Quote
Old 10-26-2004, 07:16 PM   #7
Caplin 2.5
Scooby Specialist
 
Member#: 71203
Join Date: Sep 2004
Location: SoCaL
Vehicle:
2005 2.5rs
Crystal Gray Metallic

Default

my car dips toward 500rpm too and i have an 05 rs, but it only does that when my air conditioning is on. I just gas it alot to get it to go good.
Caplin 2.5 is offline   Reply With Quote
Old 10-27-2004, 11:16 AM   #8
Airboy
Scooby Specialist
 
Member#: 72829
Join Date: Oct 2004
Chapter/Region: W. Canada
Location: Calgary, Canada
Vehicle:
2006 WRX
EFR6758

Default

The darn thing stalled on me twice this morning. This happened about 5min into the commute. Shortly after, at a stop light, I noticed that the engine would idle at 500RPM. Drive a few more minutes, and the idle is back to normal, ~750.

Will be fun trying to explain this to the service writer and then have the correct info get to the mechanic. I can just picture it...drop it off in the morning, get call later saying nothing is wrong...
Airboy is offline   Reply With Quote
Old 10-27-2004, 11:26 AM   #9
dmatthew
Scooby Newbie
 
Member#: 69247
Join Date: Aug 2004
Chapter/Region: E. Canada
Location: Toronto, Ontario - Canada
Vehicle:
2005 2.5 RS Wagon
Crystal Gray Metallic

Default

There is definitely something wrong there, can't you get a day off work to go to the dealership and then show them what's wrong with it?
dmatthew is offline   Reply With Quote
Old 10-27-2004, 06:18 PM   #10
west_minist
Scooby Specialist
 
Member#: 53451
Join Date: Jan 2004
Location: Caribbean
Vehicle:
2000 JDM Impreza SRX
w/ AVCS Silver

Default

Tell me something, how do you come to a stop? Do you deaccelerate fast to a stop?

How far do your clutch have to go in before disengaging?
west_minist is offline   Reply With Quote
Old 10-27-2004, 07:06 PM   #11
Airboy
Scooby Specialist
 
Member#: 72829
Join Date: Oct 2004
Chapter/Region: W. Canada
Location: Calgary, Canada
Vehicle:
2006 WRX
EFR6758

Default

Quote:
Originally Posted by west_minist
Tell me something, how do you come to a stop? Do you deaccelerate fast to a stop?

How far do your clutch have to go in before disengaging?
I was crusing at ~70kph and then let off the gas to coast/slow down a little before pushing the clutch in (all the way) at ~2500rpm. The tach needle just kept going past the 500 mark and then the dash lights came on. I didn't really get the chance to hit the brakes yet...the car was still coasting when it stalled.

Hopefully this will get sorted out tomorrow.
Airboy is offline   Reply With Quote
Old 10-27-2004, 07:12 PM   #12
west_minist
Scooby Specialist
 
Member#: 53451
Join Date: Jan 2004
Location: Caribbean
Vehicle:
2000 JDM Impreza SRX
w/ AVCS Silver

Default

Ok. Let us know tomorrow what it is.
west_minist is offline   Reply With Quote
Old 10-27-2004, 09:31 PM   #13
JeffrWRX
Scooby Specialist
 
Member#: 48589
Join Date: Nov 2003
Chapter/Region: SCIC
Location: Murrieta, CA + SAN DIEGO
Vehicle:
2002 PSM WAGON Stg2
FORTUNE/RPF1-17x9/2354017

Default

wierd.

Your car idles at 750RPMS???? Isn;t that high? My 04 RS idles right about 500 as does my roomates 2000 RS.

-Jeff
JeffrWRX is offline   Reply With Quote
Old 10-27-2004, 09:56 PM   #14
Airboy
Scooby Specialist
 
Member#: 72829
Join Date: Oct 2004
Chapter/Region: W. Canada
Location: Calgary, Canada
Vehicle:
2006 WRX
EFR6758

Default

Quote:
Originally Posted by 25rs92029
wierd.

Your car idles at 750RPMS???? Isn;t that high? My 04 RS idles right about 500 as does my roomates 2000 RS.

-Jeff
The tach needle points to one tick below the "1" mark. I am assuming that this is the 750 mark. See the attached pic. Kind of confusing since two ticks below "1" is "0".

My Passat and Integra both idles ~700-800rpm.
Airboy is offline   Reply With Quote
Old 10-27-2004, 10:14 PM   #15
JeffrWRX
Scooby Specialist
 
Member#: 48589
Join Date: Nov 2003
Chapter/Region: SCIC
Location: Murrieta, CA + SAN DIEGO
Vehicle:
2002 PSM WAGON Stg2
FORTUNE/RPF1-17x9/2354017

Default

I admit defeat...my car idles at 750 then. I feel stupid. I alwyas thought that mark was 500. Good luck with your car though!

-Jeff
JeffrWRX is offline   Reply With Quote
Old 11-01-2004, 01:55 PM   #16
Airboy
Scooby Specialist
 
Member#: 72829
Join Date: Oct 2004
Chapter/Region: W. Canada
Location: Calgary, Canada
Vehicle:
2006 WRX
EFR6758

Default Update after visiting dealership

UPDATE Nov 1, 2004
Well, I kind of expected this to happen....dropped the car off in the morning, received call in afternoon from dealership saying they can't reproduce the problem.

Left it over night to make sure the engine is cold....still can't reproduce the problem. They observed that sometimes the RPM would dip to ~600 but that is "normal".

Over the weekend, the car didn't stall but on several occasions the RPM dipped to 500 again.

To top it all off, they "washed" my car. It looked like whoever was washing it wet it down and started wiping with a rag. There were scratches everywhere I could see patches of dirt on the body where the guy "missed" with his grit laden rag.

Do not let Centaur Subaru of Calgary wash your car!!

Time to try another shop I think.
Airboy is offline   Reply With Quote
Old 11-03-2004, 04:50 PM   #17
sandok
Scooby Newbie
 
Member#: 72150
Join Date: Oct 2004
Default

I have the exact same problem on my Impreza 1.6LX. I went to two different shops and they did the same thing: cleaned up the throttle body and IAC valve. But the problem continues.

Does anyone know what the h...... ????

Thanks in advance.
sandok is offline   Reply With Quote
Old 11-04-2004, 07:45 AM   #18
quantum
Scooby Newbie
 
Member#: 73416
Join Date: Oct 2004
Location: PA
Vehicle:
05 CTS-v
Stealth Grey

Default

Well, if the 05 2.5rs has a throtle position sensor (I just got mine so I don't know if they use some other means) maybe asking them to reset it will fix it. My old 94 jeep had that problem, my jeeps tps was bad, but usually a reset to factory settings will fix a low idle.
quantum is offline   Reply With Quote
Old 12-08-2004, 02:46 PM   #19
Airboy
Scooby Specialist
 
Member#: 72829
Join Date: Oct 2004
Chapter/Region: W. Canada
Location: Calgary, Canada
Vehicle:
2006 WRX
EFR6758

Default

I took some video clips of the idle problem. The 2.7MB file can be found here

The camera position on the later clips are quite bad due to the tripod shifting during the drive.
Airboy is offline   Reply With Quote
Old 12-08-2004, 03:10 PM   #20
95_Impreza
Scooby Newbie
 
Member#: 76402
Join Date: Dec 2004
Chapter/Region: MAIC
Location: Franklin PA
Vehicle:
1994 Mustang GT
Green

Default

My car does the same thing, however its a 1995 and an auto. I dont really know what to tell you other than rev it up. Thats what I do and mine fixes itself for a while
95_Impreza is offline   Reply With Quote
Old 12-08-2004, 03:22 PM   #21
Jejunum
Scooby Specialist
 
Member#: 15773
Join Date: Feb 2002
Chapter/Region: MWSOC
Location: Madison
Vehicle:
2011 Impreza WRX
Silver

Default

i have the same problem, erratic idle and occasional stall only when its cold.
2.5RS (2002), automatic

someone suggested (and seems to worK) by putting the key in the on position for a second before starting up you prime the fuel pump - dunno how true / valid it is though.
Jejunum is offline   Reply With Quote
Old 12-08-2004, 05:04 PM   #22
ksubaru826
Scooby Newbie
 
Member#: 49578
Join Date: Nov 2003
Chapter/Region: Tri-State
Location: Woodbury, NY
Vehicle:
2005 legacy gt
blue

Default

This happens to my 04 RS but i have never had a problem with it ever stalling especially after i have been driving it
ksubaru826 is offline   Reply With Quote
Old 12-20-2004, 10:22 PM   #23
SubaruImpreza_power
Scooby Guru
 
Member#: 13910
Join Date: Jan 2002
Chapter/Region: NESIC
Location: Greenwich, CT
Vehicle:
1997 Legacy outback
blue

Default

My 1995 Impreza L does the samething when I start it up in the morning.
SubaruImpreza_power is offline   Reply With Quote
Old 01-19-2005, 12:39 AM   #24
Airboy
Scooby Specialist
 
Member#: 72829
Join Date: Oct 2004
Chapter/Region: W. Canada
Location: Calgary, Canada
Vehicle:
2006 WRX
EFR6758

Default

Update in first post
Airboy is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
05 RS wagon struts fit on 04 WRX wagon? mhorn0817 Newbies & FAQs 4 09-21-2009 08:50 PM
OEM 05 RS Wagon rear sway bar kashun84 Suspension/Brakes/Handling 0 05-04-2007 10:06 AM
Rallycross - My 05 RS Wagon cooparu Member's Car Gallery 18 03-02-2006 07:29 PM
WTB Exhaust to fit 05 RS wagon 2.25-2.50 inch 05rswagon Private 'Wanted' Classifieds 3 10-23-2005 02:05 AM
05 RS Wagon, 5SP, Sec upg, and fogs?? rp2000r General Community 0 11-28-2004 04:46 AM


All times are GMT -4. The time now is 01:37 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.